title: Molecular characterization of duck hepatitis B virus isolates from South African ducks.
mesh_terms: D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000097:blood / Q000235:genetics; D004372:Ducks / Q000821:virology*; D018347:Hepadnaviridae Infections / Q000662:veterinary / Q000821:virology; D015611:Hepatitis B Virus, Duck / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D006524:Hepatitis, Viral, Animal / Q000821:virology; D009690:Nucleic Acid Conformation; D010802:Phylogeny; D011201:Poultry Diseases / Q000821:virology; D012367:RNA, Viral / Q000737:chemistry / Q000235:genetics; D013019:South Africa
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral